Job 31:13

If I had despised the right of my manslave or of my maidslave, when they contended with me;

Exodus 21:20-21

And if a man smites his slave or his maid with a rod and he dies under his hand, he shall be surely punished.

Exodus 21:26-27

And if someone smites the eye of their slave or the eye of their maid that it perishes, he shall let them go free for their eye's sake.

Leviticus 25:43

Thou shalt not rule over him with rigor, but shalt fear thy God.

Leviticus 25:46

And ye shall possess them as an inheritance for your children after you, to inherit as a possession; they shall be your bondmen for ever; but over your brethren, the sons of Israel, ye shall not rule over one another with rigor.

Deuteronomy 15:12-15

And if thy brother, a Hebrew man, or a Hebrew woman, is sold unto thee and serves thee six years, then in the seventh year thou shalt send him forth from thee free.

Deuteronomy 24:14-15

Thou shalt not do violence unto a hired servant that is poor and needy, whether he is of thy brethren or of thy strangers that are in thy land within thy gates.

Jeremiah 34:14-17

At the end of seven years each one shall let his Hebrew brother go, who has been sold unto thee; therefore he shall serve thee six years, and thou shalt send him forth free from thee: but your fathers did not hearken unto me, nor incline their ear.

Ephesians 6:9

And, ye masters, do the same unto them, forbearing threats, knowing that their Master and yours is also in the heavens and that he is no respecter of persons.

Colossians 4:1

Masters, do that which is just and right with your slaves, knowing that ye also have a Master in heaven.

Treasury of Scripture Knowledge

Summary

If I did despise the cause of my manservant or of my maidservant, when they contended with me;

Bible References

The cause

Exodus 21:20
And if a man smites his slave or his maid with a rod and he dies under his hand, he shall be surely punished.
Leviticus 25:43
Thou shalt not rule over him with rigor, but shalt fear thy God.
Deuteronomy 15:12
And if thy brother, a Hebrew man, or a Hebrew woman, is sold unto thee and serves thee six years, then in the seventh year thou shalt send him forth from thee free.
Jeremiah 34:14
At the end of seven years each one shall let his Hebrew brother go, who has been sold unto thee; therefore he shall serve thee six years, and thou shalt send him forth free from thee: but your fathers did not hearken unto me, nor incline their ear.
Ephesians 6:9
And, ye masters, do the same unto them, forbearing threats, knowing that their Master and yours is also in the heavens and that he is no respecter of persons.
Colossians 4:1
Masters, do that which is just and right with your slaves, knowing that ye also have a Master in heaven.

General references

Exodus 21:26
And if someone smites the eye of their slave or the eye of their maid that it perishes, he shall let them go free for their eye's sake.
Exodus 23:6
Thou shalt not pervert the rights of thy poor in his cause.
Deuteronomy 24:14
Thou shalt not do violence unto a hired servant that is poor and needy, whether he is of thy brethren or of thy strangers that are in thy land within thy gates.